Improvement in exhattst-nozzle-valv-e device



hinted lteres @me eine.

A. o N'sLoW, or JERSEY -c1-TY,NE=W JERSEY.

Latem Patent No. 93,470, dated August 1o, 1869.

nvnovnmnn'r 1N nxHAU'sT-NozzLE-vnnvii DEVICE.

The Schedule referred to in these Letters Patent and making pf the name.

lthe smoke-stack of a steam-generator, and consists in the combination of a steam-cylinder and piston for that purpose, as will be hereinafter more fully described.

In the accompanying Vdrawing Figurel is a vertical section through the line :v a: of f ig. 2, showing the engine, cylinder, steam-port,and exhaust-passage, shown in dotted lines, with the auxiliary cylinder for operating the' valve on the exhaust;.showing also'the valve on the exhaust, and

the rod, arm, and lever, by'means of which it is opened and closed.

Figure -2 is a side-view of lthe same, showing the auxiliary cylinder in section.

-Similar letters of reference indicate corresponding parts.

A is the engine-cylinder. i B represents the smoke-chamber, into which the steam is exhausted.

' C represents the exhaust-nozzle.'

D is the valve by fwhich the exhaust is closed. E is the exhaust-port. F is the auxiliary cylinder, which s located between the throttle-valve and the induction-ports of the engine. l y i G is the rodl of the valve D, which'passes through thechamber, with an arm, H, on its. outer end, as seen in g. 2.

.I is the lever, which is connected withv the arm H `and with the pistonv of the cylinder F, having its fnlpiston acting on the lever I.

i The lower end of the auxiliary cylinder is in 4cenimunication with vthe steam-chest by means'of the passage L, and when `the steam is shut Voii bythe' throttle-valve, thevpiston audlever I will drop'by their own gravity, (aided by the momentary vacuum which occurs,) and close the valve, thus ei'ectually excluding cinders, ashes, and other injurious substances.

The closing of exhaust-nozzles of locomotive-'engines, especiallythose using coal as fuel, is very 4desirable, as with an open nozzle the iine particles of coal and cinders will enter the exhaust, and find their way under the valve-faces and into the cylinders.

lThis object becomes of much more importance, when,\in case of emergencies which frequentlyjoccn'r, the motion of the valve 1s4 reversed, with the enginel still running; in which case the engine pumps air, and draws not only cinders and ashes, but the hot air and gases-from the ues of the boiler into the steamchest and cylinder. v

Other injurious consequences not unfrequently occur, occasioned by the sudden accumulation of cornpressed air in the steam-chest and cylinder.

^ The closing of the exhaust prevents all this entirely,

and allowsthe engineer to reverse his valve-gear-witli perfect safety.

.There maybe a small cock in the bottom of the auxiliary cylinder, which the engineer can close at pleasure, thus keeping the nozzle-valve closed, and checking his speed by admitting steam to the engine on the reverse motion.

Having thus described my invention,

I claim as new, and desire to secure by Letters Patent- 1. In combination with a Vvalve for closing the ex' .haust-nozzle of a steam engine, the auxiliary cylinder F, with its piston K, and with the mechanism connected therewith for operating the valve, substantially as shown and described.

2. The cylinder F and piston K, in combination with the passage-L, whereby to open and close automatically the exhaust-nozzle of a steam-engine, substantially as herein described.

' l A.' ONSLOW.

Witnesses: s

FRANK BLocnLnY, O. L. TOPLIFF. 

